Added remote-ser.c, which is a version of remote.c that uses the routines
in the ser-*.c files. Needed for some systems, such as GO32, which don't have stuff like <termios.h>. Makefile.in now uses $(REMOTE), which defaults to remote.o, instead of remote.o.
This commit is contained in:
Sean Eric Fagan
parent
3950a34e45
commit
fabfaff466
|
|
@ -171,6 +171,8 @@ DIST=gdb
|
|||
LINT=/usr/5bin/lint
|
||||
LINTFLAGS= -I${BFD_DIR}
|
||||
|
||||
REMOTE = remote.o # Override if necessary
|
||||
|
||||
# Host and target-dependent makefile fragments come in here.
|
||||
####
|
||||
# End of host and target-dependent makefile fragments
|
||||
|
|
@ -297,7 +299,7 @@ TARFILES = ${TAGFILES_MAINDIR} ${OTHERS} ${REMOTE_EXAMPLES}
|
|||
|
||||
OBS = main.o blockframe.o breakpoint.o findvar.o stack.o source.o \
|
||||
values.o eval.o valops.o valarith.o valprint.o printcmd.o \
|
||||
symtab.o symfile.o symmisc.o infcmd.o infrun.o remote.o \
|
||||
symtab.o symfile.o symmisc.o infcmd.o infrun.o $(REMOTE) \
|
||||
command.o utils.o expprint.o environ.o version.o gdbtypes.o \
|
||||
copying.o $(DEPFILES) mem-break.o target.o \
|
||||
ieee-float.o putenv.o parse.o language.o $(YYOBJ) \
|
||||
|
|
|
|||
|
|
@ -0,0 +1,794 @@
|
|||
/* Remote target communications for serial-line targets in custom GDB protocol
|
||||
Copyright 1988, 1991, 1992 Free Software Foundation, Inc.
|
||||
|
||||
This file is part of GDB.
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||||
|
||||
/* Remote communication protocol.
|
||||
All values are encoded in ascii hex digits.
|
||||
|
||||
Request Packet
|
||||
|
||||
read registers g
|
||||
reply XX....X Each byte of register data
|
||||
is described by two hex digits.
|
||||
Registers are in the internal order
|
||||
for GDB, and the bytes in a register
|
||||
are in the same order the machine uses.
|
||||
or ENN for an error.
|
||||
|
||||
write regs GXX..XX Each byte of register data
|
||||
is described by two hex digits.
|
||||
reply OK for success
|
||||
ENN for an error
|
||||
|
||||
read mem mAA..AA,LLLL AA..AA is address, LLLL is length.
|
||||
reply XX..XX XX..XX is mem contents
|
||||
or ENN NN is errno
|
||||
|
||||
write mem MAA..AA,LLLL:XX..XX
|
||||
AA..AA is address,
|
||||
LLLL is number of bytes,
|
||||
XX..XX is data
|
||||
reply OK for success
|
||||
ENN for an error
|
||||
|
||||
cont cAA..AA AA..AA is address to resume
|
||||
If AA..AA is omitted,
|
||||
resume at same address.
|
||||
|
||||
step sAA..AA AA..AA is address to resume
|
||||
If AA..AA is omitted,
|
||||
resume at same address.
|
||||
|
||||
last signal ? Reply the current reason for stopping.
|
||||
This is the same reply as is generated
|
||||
for step or cont : SAA where AA is the
|
||||
signal number.
|
||||
|
||||
There is no immediate reply to step or cont.
|
||||
The reply comes when the machine stops.
|
||||
It is SAA AA is the "signal number"
|
||||
|
||||
or... TAAPPPPPPPPFFFFFFFF
|
||||
where AA is the signal number,
|
||||
PPPPPPPP is the PC (PC_REGNUM), and
|
||||
FFFFFFFF is the frame ptr (FP_REGNUM).
|
||||
|
||||
kill req k
|
||||
*/
|
||||
|
||||
#include "defs.h"
|
||||
#include <string.h>
|
||||
#include "serial.h"
|
||||
#include "frame.h"
|
||||
#include "inferior.h"
|
||||
#include "target.h"
|
||||
#include "wait.h"
|
||||
#include "terminal.h"
|
||||
#include "gdbcmd.h"
|
||||
|
||||
#include <signal.h>
|
||||
|
||||
static int kiodebug = 0;
|
||||
static int timeout = 5;
|
||||
|
||||
#define PBUFSIZ 1024
|
||||
|
||||
/* Maximum number of bytes to read/write at once. The value here
|
||||
is chosen to fill up a packet (the headers account for the 32). */
|
||||
#define MAXBUFBYTES ((PBUFSIZ-32)/2)
|
||||
|
||||
/* Round up PBUFSIZ to hold all the registers, at least. */
|
||||
#if REGISTER_BYTES > MAXBUFBYTES
|
||||
#undef PBUFSIZ
|
||||
#define PBUFSIZ (REGISTER_BYTES * 2 + 32)
|
||||
#endif
|
||||
|
||||
/* remote_detach()
|
||||
takes a program previously attached to and detaches it.
|
||||
We better not have left any breakpoints
|
||||
in the program or it'll die when it hits one.
|
||||
Close the open connection to the remote debugger.
|
||||
Use this when you want to detach and do something else
|
||||
with your gdb. */
|
||||
|
||||
static void
|
||||
remote_detach (args, from_tty)
|
||||
char *args;
|
||||
int from_tty;
|
||||
{
|
||||
if (args)
|
||||
error ("Argument given to \"detach\" when remotely debugging.");
|
||||
|
||||
pop_target ();
|
||||
if (from_tty)
|
||||
printf ("Ending remote debugging.\n");
|
||||
}
|
||||
|
||||
/* Convert hex digit A to a number. */
|
||||
|
||||
static int
|
||||
fromhex (a)
|
||||
int a;
|
||||
{
|
||||
if (a >= '0' && a <= '9')
|
||||
return a - '0';
|
||||
else if (a >= 'a' && a <= 'f')
|
||||
return a - 'a' + 10;
|
||||
else
|
||||
error ("Reply contains invalid hex digit");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Convert number NIB to a hex digit. */
|
||||
|
||||
static int
|
||||
tohex (nib)
|
||||
int nib;
|
||||
{
|
||||
if (nib < 10)
|
||||
return '0'+nib;
|
||||
else
|
||||
return 'a'+nib-10;
|
||||
}
|
||||
|
||||
/* Tell the remote machine to resume. */
|
||||
|
||||
/* Send a packet to the remote machine, with error checking.
|
||||
The data of the packet is in BUF. */
|
||||
|
||||
static void
|
||||
putpkt (buf)
|
||||
char *buf;
|
||||
{
|
||||
int i;
|
||||
unsigned char csum = 0;
|
||||
char buf2[PBUFSIZ];
|
||||
int cnt = strlen (buf);
|
||||
char ch;
|
||||
char *p;
|
||||
|
||||
/* Copy the packet into buffer BUF2, encapsulating it
|
||||
and giving it a checksum. */
|
||||
|
||||
if (cnt > sizeof(buf2) - 5) /* Prosanity check */
|
||||
abort();
|
||||
|
||||
p = buf2;
|
||||
*p++ = '$';
|
||||
|
||||
for (i = 0; i < cnt; i++)
|
||||
{
|
||||
csum += buf[i];
|
||||
*p++ = buf[i];
|
||||
}
|
||||
*p++ = '#';
|
||||
*p++ = tohex ((csum >> 4) & 0xf);
|
||||
*p++ = tohex (csum & 0xf);
|
||||
|
||||
/* Send it over and over until we get a positive ack. */
|
||||
|
||||
do {
|
||||
if (kiodebug)
|
||||
{
|
||||
*p = '\0';
|
||||
printf ("Sending packet: %s...", buf2); fflush(stdout);
|
||||
}
|
||||
serial_write (buf2, p - buf2);
|
||||
|
||||
/* read until either a timeout occurs (\0) or '+' is read */
|
||||
do {
|
||||
ch = readchar ();
|
||||
if (kiodebug) {
|
||||
if (ch == '+')
|
||||
printf("Ack\n");
|
||||
else
|
||||
printf ("%02X%c ", ch&0xFF, ch);
|
||||
}
|
||||
} while ((ch != '+') && (ch != '\0'));
|
||||
} while (ch != '+');
|
||||
}
|
||||
|
||||
/* Read a packet from the remote machine, with error checking,
|
||||
and store it in BUF. BUF is expected to be of size PBUFSIZ. */
|
||||
|
||||
static void
|
||||
getpkt (buf)
|
||||
char *buf;
|
||||
{
|
||||
char *bp;
|
||||
unsigned char csum;
|
||||
int c;
|
||||
unsigned char c1, c2;
|
||||
|
||||
while (1)
|
||||
{
|
||||
/* Force csum to be zero here because of possible error retry. */
|
||||
csum = 0;
|
||||
|
||||
while ((c = readchar()) != '$');
|
||||
|
||||
bp = buf;
|
||||
while (1)
|
||||
{
|
||||
c = readchar ();
|
||||
if (c == '#')
|
||||
break;
|
||||
if (bp >= buf+PBUFSIZ-1)
|
||||
{
|
||||
*bp = '\0';
|
||||
printf_filtered ("Remote packet too long: %s\n", buf);
|
||||
goto whole;
|
||||
}
|
||||
*bp++ = c;
|
||||
csum += c;
|
||||
}
|
||||
*bp = 0;
|
||||
|
||||
c1 = fromhex (readchar ());
|
||||
c2 = fromhex (readchar ());
|
||||
if ((csum & 0xff) == (c1 << 4) + c2)
|
||||
break;
|
||||
printf_filtered ("Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
|
||||
(c1 << 4) + c2, csum & 0xff, buf);
|
||||
/* Try the whole thing again. */
|
||||
whole:
|
||||
serial_write ("-", 1);
|
||||
}
|
||||
|
||||
#if 0
|
||||
immediate_quit--;
|
||||
#endif
|
||||
|
||||
serial_write ("+", 1);
|
||||
|
||||
if (kiodebug)
|
||||
fprintf (stderr,"Packet received: %s\n", buf);
|
||||
}
|
||||
|
||||
static void
|
||||
remote_resume (step, siggnal)
|
||||
int step, siggnal;
|
||||
{
|
||||
char buf[PBUFSIZ];
|
||||
|
||||
if (siggnal)
|
||||
error ("Can't send signals to a remote system. Try `handle %d ignore'.",
|
||||
siggnal);
|
||||
|
||||
#if 0
|
||||
dcache_flush ();
|
||||
#endif
|
||||
|
||||
strcpy (buf, step ? "s": "c");
|
||||
|
||||
putpkt (buf);
|
||||
}
|
||||
|
||||
/* Send ^C to target to halt it. Target will respond, and send us a
|
||||
packet. */
|
||||
|
||||
void remote_interrupt(signo)
|
||||
int signo;
|
||||
{
|
||||
|
||||
if (kiodebug)
|
||||
printf ("remote_interrupt called\n");
|
||||
|
||||
serial_write ("\003", 1); /* Send a ^C */
|
||||
}
|
||||
|
||||
|
||||
/* Wait until the remote machine stops, then return,
|
||||
storing status in STATUS just as `wait' would.
|
||||
Returns "pid" (though it's not clear what, if anything, that
|
||||
means in the case of this target). */
|
||||
|
||||
static int
|
||||
remote_wait (status)
|
||||
WAITTYPE *status;
|
||||
{
|
||||
unsigned char buf[PBUFSIZ];
|
||||
void (*ofunc)();
|
||||
unsigned char *p;
|
||||
int i;
|
||||
char regs[REGISTER_RAW_SIZE (PC_REGNUM) + REGISTER_RAW_SIZE (FP_REGNUM)];
|
||||
|
||||
WSETEXIT ((*status), 0);
|
||||
|
||||
ofunc = (void (*)()) signal (SIGINT, remote_interrupt);
|
||||
getpkt ((char *) buf);
|
||||
signal (SIGINT, ofunc);
|
||||
|
||||
if (buf[0] == 'E')
|
||||
error ("Remote failure reply: %s", buf);
|
||||
if (buf[0] == 'T')
|
||||
{
|
||||
/* Expedited reply, containing Signal, PC, and FP. */
|
||||
p = &buf[3]; /* after Txx */
|
||||
for (i = 0; i < sizeof (regs); i++)
|
||||
{
|
||||
if (p[0] == 0 || p[1] == 0)
|
||||
error ("Remote reply is too short: %s", buf);
|
||||
regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
|
||||
p += 2;
|
||||
}
|
||||
supply_register (PC_REGNUM, ®s[0]);
|
||||
supply_register (FP_REGNUM, ®s[REGISTER_RAW_SIZE (PC_REGNUM)]);
|
||||
}
|
||||
else if (buf[0] != 'S')
|
||||
error ("Invalid remote reply: %s", buf);
|
||||
|
||||
WSETSTOP ((*status), (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Send the command in BUF to the remote machine,
|
||||
and read the reply into BUF.
|
||||
Report an error if we get an error reply. */
|
||||
|
||||
static void
|
||||
remote_send (buf)
|
||||
char *buf;
|
||||
{
|
||||
|
||||
putpkt (buf);
|
||||
getpkt (buf);
|
||||
|
||||
if (buf[0] == 'E')
|
||||
error ("Remote failure reply: %s", buf);
|
||||
}
|
||||
|
||||
/* Read the remote registers into the block REGS. */
|
||||
/* Currently we just read all the registers, so we don't use regno. */
|
||||
/* ARGSUSED */
|
||||
static void
|
||||
remote_fetch_registers (regno)
|
||||
int regno;
|
||||
{
|
||||
char buf[PBUFSIZ];
|
||||
int i;
|
||||
char *p;
|
||||
char regs[REGISTER_BYTES];
|
||||
|
||||
sprintf (buf, "g");
|
||||
remote_send (buf);
|
||||
|
||||
/* Reply describes registers byte by byte, each byte encoded as two
|
||||
hex characters. Suck them all up, then supply them to the
|
||||
register cacheing/storage mechanism. */
|
||||
|
||||
p = buf;
|
||||
for (i = 0; i < REGISTER_BYTES; i++)
|
||||
{
|
||||
if (p[0] == 0 || p[1] == 0)
|
||||
error ("Remote reply is too short: %s", buf);
|
||||
regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
|
||||
p += 2;
|
||||
}
|
||||
for (i = 0; i < NUM_REGS; i++)
|
||||
supply_register (i, ®s[REGISTER_BYTE(i)]);
|
||||
}
|
||||
|
||||
/* Prepare to store registers. Since we send them all, we have to
|
||||
read out the ones we don't want to change first. */
|
||||
|
||||
static void
|
||||
remote_prepare_to_store ()
|
||||
{
|
||||
remote_fetch_registers (-1);
|
||||
}
|
||||
|
||||
/* Store the remote registers from the contents of the block REGISTERS.
|
||||
FIXME, eventually just store one register if that's all that is needed. */
|
||||
|
||||
/* ARGSUSED */
|
||||
static void
|
||||
remote_store_registers (regno)
|
||||
int regno;
|
||||
{
|
||||
char buf[PBUFSIZ];
|
||||
int i;
|
||||
char *p;
|
||||
|
||||
buf[0] = 'G';
|
||||
|
||||
/* Command describes registers byte by byte,
|
||||
each byte encoded as two hex characters. */
|
||||
|
||||
p = buf + 1;
|
||||
for (i = 0; i < REGISTER_BYTES; i++)
|
||||
{
|
||||
*p++ = tohex ((registers[i] >> 4) & 0xf);
|
||||
*p++ = tohex (registers[i] & 0xf);
|
||||
}
|
||||
*p = '\0';
|
||||
|
||||
remote_send (buf);
|
||||
}
|
||||
|
||||
|
||||
/* Write memory data directly to the remote machine.
|
||||
This does not inform the data cache; the data cache uses this.
|
||||
MEMADDR is the address in the remote memory space.
|
||||
MYADDR is the address of the buffer in our space.
|
||||
LEN is the number of bytes. */
|
||||
|
||||
static void
|
||||
remote_write_bytes (memaddr, myaddr, len)
|
||||
CORE_ADDR memaddr;
|
||||
char *myaddr;
|
||||
int len;
|
||||
{
|
||||
char buf[PBUFSIZ];
|
||||
int i;
|
||||
char *p;
|
||||
|
||||
if (len > PBUFSIZ / 2 - 20)
|
||||
abort ();
|
||||
|
||||
sprintf (buf, "M%x,%x:", memaddr, len);
|
||||
|
||||
/* We send target system values byte by byte, in increasing byte addresses,
|
||||
each byte encoded as two hex characters. */
|
||||
|
||||
p = buf + strlen (buf);
|
||||
for (i = 0; i < len; i++)
|
||||
{
|
||||
*p++ = tohex ((myaddr[i] >> 4) & 0xf);
|
||||
*p++ = tohex (myaddr[i] & 0xf);
|
||||
}
|
||||
*p = '\0';
|
||||
|
||||
remote_send (buf);
|
||||
}
|
||||
|
||||
/* Read memory data directly from the remote machine.
|
||||
This does not use the data cache; the data cache uses this.
|
||||
MEMADDR is the address in the remote memory space.
|
||||
MYADDR is the address of the buffer in our space.
|
||||
LEN is the number of bytes. */
|
||||
|
||||
static void
|
||||
remote_read_bytes (memaddr, myaddr, len)
|
||||
CORE_ADDR memaddr;
|
||||
char *myaddr;
|
||||
int len;
|
||||
{
|
||||
char buf[PBUFSIZ];
|
||||
int i;
|
||||
char *p;
|
||||
|
||||
if (len > PBUFSIZ / 2 - 1)
|
||||
abort ();
|
||||
|
||||
sprintf (buf, "m%x,%x", memaddr, len);
|
||||
remote_send (buf);
|
||||
|
||||
/* Reply describes memory byte by byte,
|
||||
each byte encoded as two hex characters. */
|
||||
|
||||
p = buf;
|
||||
for (i = 0; i < len; i++)
|
||||
{
|
||||
if (p[0] == 0 || p[1] == 0)
|
||||
error ("Remote reply is too short: %s", buf);
|
||||
myaddr[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
|
||||
p += 2;
|
||||
}
|
||||
}
|
||||
|
||||
/* Read or write LEN bytes from inferior memory at MEMADDR, transferring
|
||||
to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is
|
||||
nonzero. Returns length of data written or read; 0 for error. */
|
||||
|
||||
/* ARGSUSED */
|
||||
static int
|
||||
remote_xfer_memory(memaddr, myaddr, len, should_write, target)
|
||||
CORE_ADDR memaddr;
|
||||
char *myaddr;
|
||||
int len;
|
||||
int should_write;
|
||||
struct target_ops *target; /* ignored */
|
||||
{
|
||||
int origlen = len;
|
||||
int xfersize;
|
||||
while (len > 0)
|
||||
{
|
||||
if (len > MAXBUFBYTES)
|
||||
xfersize = MAXBUFBYTES;
|
||||
else
|
||||
xfersize = len;
|
||||
|
||||
if (should_write)
|
||||
remote_write_bytes(memaddr, myaddr, xfersize);
|
||||
else
|
||||
remote_read_bytes (memaddr, myaddr, xfersize);
|
||||
memaddr += xfersize;
|
||||
myaddr += xfersize;
|
||||
len -= xfersize;
|
||||
}
|
||||
return origlen; /* no error possible */
|
||||
}
|
||||
|
||||
static void
|
||||
remote_files_info (ignore)
|
||||
struct target_ops *ignore;
|
||||
{
|
||||
printf ("Debugging a target over a serial line.\n");
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
A debug packet whose contents are <data>
|
||||
is encapsulated for transmission in the form:
|
||||
|
||||
$ <data> # CSUM1 CSUM2
|
||||
|
||||
<data> must be ASCII alphanumeric and cannot include characters
|
||||
'$' or '#'
|
||||
|
||||
CSUM1 and CSUM2 are ascii hex representation of an 8-bit
|
||||
checksum of <data>, the most significant nibble is sent first.
|
||||
the hex digits 0-9,a-f are used.
|
||||
|
||||
Receiver responds with:
|
||||
|
||||
+ - if CSUM is correct and ready for next packet
|
||||
- - if CSUM is incorrect
|
||||
|
||||
*/
|
||||
|
||||
/* Read a single character from the remote end.
|
||||
(If supported, we actually read many characters and buffer them up.) */
|
||||
|
||||
static int
|
||||
readchar ()
|
||||
{
|
||||
static int inbuf_index, inbuf_count;
|
||||
#define INBUFSIZE PBUFSIZ
|
||||
static char inbuf[INBUFSIZE];
|
||||
|
||||
if (inbuf_index >= inbuf_count)
|
||||
{
|
||||
/* Time to do another read... */
|
||||
inbuf_index = 0;
|
||||
inbuf_count = 0;
|
||||
inbuf[0] = 0; /* Just in case */
|
||||
if ((inbuf[inbuf_index] = serial_readchar (timeout)) < 0)
|
||||
inbuf_count = -1;
|
||||
else
|
||||
inbuf_count = 1;
|
||||
}
|
||||
|
||||
/* Just return the next character from the buffer. */
|
||||
return inbuf[inbuf_index++] & 0x7f;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* The data cache leads to incorrect results because it doesn't know about
|
||||
volatile variables, thus making it impossible to debug functions which
|
||||
use hardware registers. Therefore it is #if 0'd out. Effect on
|
||||
performance is some, for backtraces of functions with a few
|
||||
arguments each. For functions with many arguments, the stack
|
||||
frames don't fit in the cache blocks, which makes the cache less
|
||||
helpful. Disabling the cache is a big performance win for fetching
|
||||
large structures, because the cache code fetched data in 16-byte
|
||||
chunks. */
|
||||
#if 0
|
||||
/* The data cache records all the data read from the remote machine
|
||||
since the last time it stopped.
|
||||
|
||||
Each cache block holds 16 bytes of data
|
||||
starting at a multiple-of-16 address. */
|
||||
|
||||
#define DCACHE_SIZE 64 /* Number of cache blocks */
|
||||
|
||||
struct dcache_block {
|
||||
struct dcache_block *next, *last;
|
||||
unsigned int addr; /* Address for which data is recorded. */
|
||||
int data[4];
|
||||
};
|
||||
|
||||
struct dcache_block dcache_free, dcache_valid;
|
||||
|
||||
/* Free all the data cache blocks, thus discarding all cached data. */
|
||||
|
||||
static void
|
||||
dcache_flush ()
|
||||
{
|
||||
register struct dcache_block *db;
|
||||
|
||||
while ((db = dcache_valid.next) != &dcache_valid)
|
||||
{
|
||||
remque (db);
|
||||
insque (db, &dcache_free);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* If addr is present in the dcache, return the address of the block
|
||||
* containing it.
|
||||
*/
|
||||
|
||||
struct dcache_block *
|
||||
dcache_hit (addr)
|
||||
{
|
||||
register struct dcache_block *db;
|
||||
|
||||
if (addr & 3)
|
||||
abort ();
|
||||
|
||||
/* Search all cache blocks for one that is at this address. */
|
||||
db = dcache_valid.next;
|
||||
while (db != &dcache_valid)
|
||||
{
|
||||
if ((addr & 0xfffffff0) == db->addr)
|
||||
return db;
|
||||
db = db->next;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Return the int data at address ADDR in dcache block DC. */
|
||||
|
||||
int
|
||||
dcache_value (db, addr)
|
||||
struct dcache_block *db;
|
||||
unsigned int addr;
|
||||
{
|
||||
if (addr & 3)
|
||||
abort ();
|
||||
return (db->data[(addr>>2)&3]);
|
||||
}
|
||||
|
||||
/* Get a free cache block, put it on the valid list,
|
||||
and return its address. The caller should store into the block
|
||||
the address and data that it describes. */
|
||||
|
||||
struct dcache_block *
|
||||
dcache_alloc ()
|
||||
{
|
||||
register struct dcache_block *db;
|
||||
|
||||
if ((db = dcache_free.next) == &dcache_free)
|
||||
/* If we can't get one from the free list, take last valid */
|
||||
db = dcache_valid.last;
|
||||
|
||||
remque (db);
|
||||
insque (db, &dcache_valid);
|
||||
return (db);
|
||||
}
|
||||
|
||||
/* Return the contents of the word at address ADDR in the remote machine,
|
||||
using the data cache. */
|
||||
|
||||
int
|
||||
dcache_fetch (addr)
|
||||
CORE_ADDR addr;
|
||||
{
|
||||
register struct dcache_block *db;
|
||||
|
||||
db = dcache_hit (addr);
|
||||
if (db == 0)
|
||||
{
|
||||
db = dcache_alloc ();
|
||||
remote_read_bytes (addr & ~0xf, db->data, 16);
|
||||
db->addr = addr & ~0xf;
|
||||
}
|
||||
return (dcache_value (db, addr));
|
||||
}
|
||||
|
||||
/* Write the word at ADDR both in the data cache and in the remote machine. */
|
||||
|
||||
dcache_poke (addr, data)
|
||||
CORE_ADDR addr;
|
||||
int data;
|
||||
{
|
||||
register struct dcache_block *db;
|
||||
|
||||
/* First make sure the word is IN the cache. DB is its cache block. */
|
||||
db = dcache_hit (addr);
|
||||
if (db == 0)
|
||||
{
|
||||
db = dcache_alloc ();
|
||||
remote_read_bytes (addr & ~0xf, db->data, 16);
|
||||
db->addr = addr & ~0xf;
|
||||
}
|
||||
|
||||
/* Modify the word in the cache. */
|
||||
db->data[(addr>>2)&3] = data;
|
||||
|
||||
/* Send the changed word. */
|
||||
remote_write_bytes (addr, &data, 4);
|
||||
}
|
||||
|
||||
/* Initialize the data cache. */
|
||||
|
||||
dcache_init ()
|
||||
{
|
||||
register i;
|
||||
register struct dcache_block *db;
|
||||
|
||||
db = (struct dcache_block *) xmalloc (sizeof (struct dcache_block) *
|
||||
DCACHE_SIZE);
|
||||
dcache_free.next = dcache_free.last = &dcache_free;
|
||||
dcache_valid.next = dcache_valid.last = &dcache_valid;
|
||||
for (i=0;i<DCACHE_SIZE;i++,db++)
|
||||
insque (db, &dcache_free);
|
||||
}
|
||||
#endif /* 0 */
|
||||
|
||||
/* Define the target subroutine names */
|
||||
|
||||
struct target_ops remote_ops = {
|
||||
"remote-ser", /* to_shortname */
|
||||
"Remote serial target in gdb-specific protocol with serial-packaging routines", /* to_longname */
|
||||
"Use a remote computer via a serial line, using a gdb-specific protocol.\n\
|
||||
Specify the serial device it is connected to (e.g. /dev/ttya).", /* to_doc */
|
||||
serial_open, /* to_open */
|
||||
serial_close, /* to_close */
|
||||
NULL, /* to_attach */
|
||||
remote_detach, /* to_detach */
|
||||
remote_resume, /* to_resume */
|
||||
remote_wait, /* to_wait */
|
||||
remote_fetch_registers, /* to_fetch_registers */
|
||||
remote_store_registers, /* to_store_registers */
|
||||
remote_prepare_to_store, /* to_prepare_to_store */
|
||||
NULL, /* to_convert_to_virtual */
|
||||
NULL, /* to_convert_from_virtual */
|
||||
remote_xfer_memory, /* to_xfer_memory */
|
||||
remote_files_info, /* to_files_info */
|
||||
NULL, /* to_insert_breakpoint */
|
||||
NULL, /* to_remove_breakpoint */
|
||||
NULL, /* to_terminal_init */
|
||||
NULL, /* to_terminal_inferior */
|
||||
NULL, /* to_terminal_ours_for_output */
|
||||
NULL, /* to_terminal_ours */
|
||||
NULL, /* to_terminal_info */
|
||||
NULL, /* to_kill */
|
||||
NULL, /* to_load */
|
||||
NULL, /* to_lookup_symbol */
|
||||
NULL, /* to_create_inferior */
|
||||
NULL, /* to_mourn_inferior */
|
||||
process_stratum, /* to_stratum */
|
||||
NULL, /* to_next */
|
||||
1, /* to_has_all_memory */
|
||||
1, /* to_has_memory */
|
||||
1, /* to_has_stack */
|
||||
1, /* to_has_registers */
|
||||
1, /* to_has_execution */
|
||||
NULL, /* sections */
|
||||
NULL, /* sections_end */
|
||||
OPS_MAGIC /* to_magic */
|
||||
};
|
||||
|
||||
void
|
||||
_initialize_remote ()
|
||||
{
|
||||
add_target (&remote_ops);
|
||||
|
||||
add_show_from_set (
|
||||
add_set_cmd ("remotedebug", no_class, var_boolean, (char *)&kiodebug,
|
||||
"Set debugging of remote serial I/O.\n\
|
||||
When enabled, each packet sent or received with the remote target\n\
|
||||
is displayed.", &setlist),
|
||||
&showlist);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue